.s_face {
    width: 30px;
    height: 30px;
    background: transparent url(./fFace.png) no-repeat scroll left top;
}

.s_face[face="fuck"] {
    display: inline-block;
    color: #000;
    font-size: 14px;
    text-decoration: none;
    background-position: left -300px;
    background-size: 100%;
}
